package com.shuiyu.cloud.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

import java.util.Date;

/**
 * @author rjw
 * <p>Description:   </p>
 * @ClassName MyLogGateWayFilter
 * @time 2021/7/19 15:56
 */
@Component
@Slf4j
public class MyLogGateWayFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        log.info("**********come in MyLogGateWayFilter :  "+ new Date());
        String uname = exchange.getRequest().getQueryParams().getFirst("uname");
        if (uname==null){
            log.info("*******用户名为null,非法用户");
            exchange.getResponse().setStatusCode(HttpStatus.NOT_ACCEPTABLE);
            return exchange.getResponse().setComplete();   //告诉别人错在哪里
        }
        return chain.filter(exchange); //放行，到下一个过滤链
    }

    /**
     * 数值越小，优先级越高
     * @return
     */
    @Override
    public int getOrder() {
        return 0;
    }
}
